说明:用并行芯片8255实现抢答器,空格键清除,并且有人抢答,计算机蜂鸣器会响起,并显示组号,经过8255实际芯片测试-Parallel chip to achieve Responder 8255, the space key to remove, and it was to answer in the computer buzzer will be sounded, and displays the group number, after
<一> 在 2024-11-13 上传
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